65138105488687 has 16 divisors (see below), whose sum is σ = 81356945536512. Its totient is φ = 50665839671520.

The previous prime is 65138105488657. The next prime is 65138105488711. The reversal of 65138105488687 is 78688450183156.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-65138105488687 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65138105488657) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 759337203 + ... + 759422980.

It is an arithmetic number, because the mean of its divisors is an integer number (5084809096032).

Almost surely, 2^{65138105488687} is an apocalyptic number.

65138105488687 is a deficient number, since it is larger than the sum of its proper divisors (16218840047825).

65138105488687 is a wasteful number, since it uses less digits than its factorization.

65138105488687 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1518760758.

The product of its (nonzero) digits is 309657600, while the sum is 70.

The spelling of 65138105488687 in words is "sixty-five trillion, one hundred thirty-eight billion, one hundred five million, four hundred eighty-eight thousand, six hundred eighty-seven".